I get "Market disabled for maintenance, please try again later" error message when try to ask new order. It 3d date it happens for me. I still can create a trade manually in "My shop" section.

Dispenser.tf is getting some updates ready, testing etc so Trading will be enabled next week, check this announcement on Dispenser's Steam Group: http://steamcommunity.com/groups/dispensertf#announcements/detail/121959095669833456